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. 2020 Nov 30;10:20872. doi: 10.1038/s41598-020-77873-7

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Bending comparisons in the arms of O. bimaculoides. Stacked bars representing the contributions of the distal, medial, and proximal arm regions are given for each of the four directions of bending. Oral bending was significantly lower than bending in other directions (X² = 19.42, p = 0.001). Asterisks indicate significant differences in bending direction at p < 0.01.